Skip the auto shop - Our mechanics make house calls

Q: I have a problem with my truck vibrating.

asked by on

My truck started off with a slight vibration now it has increased severely. It vibrates in all gears. Park, drive, reverse. It vibrates so bad even my dashboard rattles. The spark plugs & engine mounts have been replaced and there is no engine light on. I took it to a mechanic and they cannot find the problem. Please help besides this issue the truck runs great.

My car has 100000 miles.
My car has an automatic transmission.

If a motor vibrates while in park idling, there is either a balance issue with the motor or an engine mount problem. Locating such problems is not for the faint of heart. There are several techniques that can be done, mostly using a large pry bar to apply tension one mount at a time. When you do this with a mount and the vibration changes significantly, then you have found the mount that is the problem.

With that said, your Envoy has a few things that commonly cause this problem. The engine and transmission mounts will cause this. If the engine mounts are found to be the problem, they need to be factory parts. Many are having problems installing new aftermarket mounts that don’t fix the problem. The transmission mount get rocks stuck in it. This takes away the ability of the transmission mount to dampen vibration. This is due to the angle of the mount that makes it catch rocks from the road while you are driving.

The mounts are the most common if not main issue causing vibrations. It is possible, and I have seen such issues on other GM vehicles, for the harmonic balancer to create vibration problems. But as far as I know, I have not seen it or heard of another having vibration problems due to the harmonic balancer. The engine and transmission mounts are the main culprit on your vehicle.

I recommend the following inspection to help you out. Car is shaking and vibrating inspection

Good luck!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Possible ECM problem

Hello! Im assuming the code was a P0606 which indicates a PCM/ECM processor internal fault. I suggest checking the wiring and terminal at the ECM because at times it will be just a bad connection/wire causing the trouble code. There...

Q: Vibrations and then shuts off

Hello there, many different faults that can cause your 2004 Suzuki Grand Vitara to die after starting. The most common would be the power brake booster, vacuum leak, exhaust leak, fuel pump, wiring harness fault, oxygen sensor, or a failing...

Q: Front driver side wheel squealing while driving

The fact that it gets quieter when you apply the brakes is a pretty good sign it is a brake issue. It is very common for small pieces of brake hardware, which are made of thin sheet metal, to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...